Like Power mentioned, no proof, is no Further action, and you will have to use this format.
Name of the staff member you are reporting:
Proof:(Includes, video's, screenshots etc)
What rule has been broken:
Tell us in short what he actually have done:
What consequence(s) do they deserve?:
Additonal comments:
If you do not use this format no further action will be taken and you're post will be deleted.